CN1632659A - Visual angle adjustable liquid crystal display - Google Patents

Visual angle adjustable liquid crystal display Download PDF

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Publication number
CN1632659A
CN1632659A CN 200510003964 CN200510003964A CN1632659A CN 1632659 A CN1632659 A CN 1632659A CN 200510003964 CN200510003964 CN 200510003964 CN 200510003964 A CN200510003964 A CN 200510003964A CN 1632659 A CN1632659 A CN 1632659A
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liquid crystal
alignment films
orientation
viewing angle
polarizer
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CN 200510003964
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CN100353229C (en
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蔡孟璋
张志明
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AU Optronics Corp
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AU Optronics Corp
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Abstract

This invention provides a vision angle adjustable LCD panel, whose first deflection plate, LCD panel, vision angle adjusting device and second defection plate are set on the aphototropism module with the LCD panel and vision angle adjustable device set on the first and second deflection plates. The vision angel adjustable device comprises the first transparent base plate, one second transparent base plate, one transparent electrode and second transparent electrode, one first tropism film and second tropism film and one LCD layer. The first transparent electrode is set on the first transparent base plate and the first tropism film is set on the first transparent electrode. The second transparent electrode is set on the LCD layer and the second tropism film is set on the down surface of the second transparent electrode.

Description

The LCD that the visual angle is adjustable
Technical field
The present invention relates to a kind of display, particularly relate to the adjustable LCD in a kind of visual angle.
Background technology
(liquid crystal display LCD) has the compact advantage of low radiation and volume to LCD, so day by day extensive on using.And thin film transistor (TFT) (thin film transistor, TFT) LCD is because its high brightness and with great visual angle characteristic are very popular especially on the high-order product.Traditional TFT LCD by Polarizer on the backlight module,, a display panels and once Polarizer constituted, display panels is arranged at Polarizer and reaches between time Polarizer.Backlight module is arranged at down under the Polarizer, and the light penetrating shaft of Polarizer was vertical mutually under last Polarizer reached.In addition, display panels comprises a upper substrate, an infrabasal plate and a liquid crystal layer, upper substrate comprises an alignment films and a black matrix" (black matrix) on community electrode, the colored filter,, and infrabasal plate comprises that a plurality of sweep traces (scan line), a plurality of data line (data line), a plurality of storage capacitors (storage capacitor), a plurality of TFT, a plurality of pixel electrode reach alignment films.In addition, be maintained constant spacing between upper substrate and the infrabasal plate, make liquid crystal layer be sealed in the constant spacing between upper substrate and the infrabasal plate by sept.
Along with the progress of science and technology, the modern has more that multimachine can use the electronic product with LCD in public places, as mobile phone, personal digital assistant and mobile computer etc.With mobile computer, when the user uses mobile computer, because the people arround the design of the visual angle (viewangle) of traditional LCD allows easily sees the picture that LCD is shown from the side, allow the user can't possess individual privacy, and the high confidentiality of keeping personal data.So in order to satisfy modern human needs, therefore the visual angle of the LCD technology (view angle narrowing technology) that narrows just produces.
Please be simultaneously with reference to Figure 1A～1B, it illustrates respectively is the side schematic view of traditional LCD when being in narrow field-of-view mode and wide viewing angle pattern.LCD 10 comprises a display panels 13 and a polymer dispersion type liquid crystal (polymer dispersed liquid crystal at least, PDLC) device 11, polymer dispersion type liquid crystal device 11 comprises upper glass, lower glass plate, liquid crystal molecule and macromolecule, and liquid crystal molecule and polymeric seal are between upper substrate and infrabasal plate.Shown in Figure 1A, when polymer dispersion type liquid crystal device 11 is applied in a pressure reduction, because the refractive index (n of the minor axis of the liquid crystal molecule in the polymer dispersion type liquid crystal device 11 0) will equal high molecular refractive index, make polymer dispersion type liquid crystal device 11 be in pellucidity (transparent state).At this moment, the 12a parallel backlight that comes from a backlight module will be directly by behind the polymer dispersion type liquid crystal device 11, and direct projection display panels 13 makes LCD 10 be in a narrow field-of-view mode.That is to say that the observer who only faces LCD 10 can see the shown picture of display panels 13, the observer of any stravismus LCD 10 can't see the shown picture of display panels 13.
Shown in Figure 1B, when polymer dispersion type liquid crystal device 11 is not applied to any pressure reduction, because the refractive index (n of the major axis of the liquid crystal molecule of polymer dispersion type liquid crystal device 11 e) will be not equal to high molecular refractive index, make polymer dispersion type liquid crystal device 11 be in scattering state (scattering state).At this moment, parallel 12a backlight by polymer dispersion type liquid crystal device 11 after, will become non-parallel 12b backlight, and non-parallel 12b backlight will inject in the display panels 13, make LCD 10 be in a wide viewing angle pattern.That is to say, face or the observer that looks side ways LCD 10 all can see the shown picture of display panels 13.So the user is in wide viewing angle pattern or narrow field-of-view mode by the pellucidity of polymer dispersion type liquid crystal device 11 and the switching mode of scattering state with decision LCD 10.
Because the backlight module that comes from usually backlight of LCD 10, yet, with the luminescence technology of present backlight module, and can't provide real parallel backlight.Even LCD 10 has been in the narrow field-of-view mode shown in Figure 1A, under the non-real situation of injecting display panels 13 parallel backlight of reality, cause the onlooker still can see the picture that display panels 13 is shown during LCD 10 in stravismus, allow privacy of possessing the individual that the user can't be real and the high confidentiality of keeping personal data.In addition, when polymer dispersion type liquid crystal device 11 was in scattering state, because the 12a parallel backlight of polymer dispersion type liquid crystal device 11 meeting reflecting parts makes the brightness of LCD 10 to be lowered, the running quality that influences LCD 10 was very huge.
Summary of the invention
In view of this, purpose of the present invention is exactly to provide a kind of visual angle adjustable LCD.The design of its viewing angle adjustment device can positively allow the field-of-view mode of any switching liquid crystal display of user between wide viewing angle pattern and narrow field-of-view mode, reaches the adjustable purpose in visual angle of LCD.Thus, not only can ensure individual's privacy, also can keep the high confidentiality of data, promote the practicality of LCD widely.In addition, when the field-of-view mode of user's switching liquid crystal display, can't change LCD to brightness when, allow the user that faces LCD can not discover the variation to brightness when of LCD, keep the good running quality of LCD.
According to purpose of the present invention, the adjustable LCD in a kind of visual angle is proposed, comprise a backlight module, one first Polarizer, one second Polarizer, a display panels and a viewing angle adjustment device.First Polarizer, display panels, viewing angle adjustment device and second Polarizer all are arranged on the backlight module, and on display panels and viewing angle adjustment device be arranged between first Polarizer and second Polarizer.Viewing angle adjustment device comprises one first transparency carrier, one second transparency carrier, one first transparency electrode, one second transparency electrode, one first alignment films, one second alignment films and a liquid crystal layer.First transparency electrode is formed on first transparency carrier, and first alignment films is formed on first transparency electrode.Liquid crystal layer is arranged on first alignment films, and second alignment films is arranged on the liquid crystal layer.Second transparency electrode is arranged on the liquid crystal layer, and second alignment films is formed at the lower surface of second transparency electrode.Second transparency carrier is arranged on the liquid crystal layer, and with first transparency carrier liquid crystal layer is sealed, and second transparency electrode is formed at the lower surface of second transparency carrier.
According to purpose of the present invention, another purpose is proposed, the method for the adjustable LCD in a kind of driving one visual angle is proposed, the LCD that the visual angle is adjustable comprises at least one viewing angle adjustment device, viewing angle adjustment device has the saturation voltage of a liquid crystal mode.In the method, at first, carry out a wide viewing angle pattern, comprise that this viewing angle adjustment device produces one first pressure reduction, wherein first pressure reduction is 0 or greater than the saturation voltage of liquid crystal mode.Then, carry out a narrow field-of-view mode, comprise that this viewing angle adjustment device produces one second pressure reduction, wherein second pressure reduction is greater than the saturation voltage of 0.5 times liquid crystal mode, but less than the saturation voltage of 0.8 times liquid crystal mode.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, following conjunction with figs. and preferred embodiment are to illustrate in greater detail the present invention.
Description of drawings
Figure 1A illustrates is the side schematic view of traditional LCD when being in narrow field-of-view mode.
Figure 1B illustrates is the side schematic view of traditional LCD when being in the wide viewing angle pattern.
Fig. 2 illustrates is side schematic view according to the adjustable LCD in the visual angle of embodiments of the invention one.
Fig. 3 A illustrates is the liquid crystal molecule of the viewing angle adjustment device with first alignment films of Fig. 2 sectional view when being in erectility.
Fig. 3 B illustrates is the liquid crystal molecule of viewing angle adjustment device of Fig. 3 A schematic top plan view when upright on first alignment films.
Fig. 4 A illustrates is the sectional view that the liquid crystal molecule of the viewing angle adjustment device with first alignment films of Fig. 2 was in for 1 when falling the state.
Fig. 4 B illustrates be the liquid crystal molecule of viewing angle adjustment device of Fig. 4 A on first alignment films toward the position angle schematic top plan view when 90 degree half fall.
Fig. 5 A illustrates is the sectional view that the liquid crystal molecule of the viewing angle adjustment device with first alignment films of Fig. 2 was in for 1 when falling the state.
What Fig. 5 B illustrated is the liquid crystal molecule schematic top plan view that past position angle 90 is spent when lying low on first alignment films of the viewing angle adjustment device of Fig. 5 A.
Fig. 6 A illustrates is the contrast contour map of the display of Fig. 2 state when being in the first wide viewing angle pattern.
Fig. 6 B illustrates is the contrast contour map of the display of Fig. 2 state when being in narrow field-of-view mode.
Fig. 7 A illustrates is the rectangular coordinate graph of a relation of observer's light transmittance (T) of the observed adjustable LCD of driving voltage (V) and visual angle to the display panels of display when the first wide viewing angle pattern when facing display.
Fig. 7 B illustrates is the rectangular coordinate graph of a relation of observer's light transmittance (T) of the observed adjustable LCD of driving voltage (V) and visual angle to the display panels of display when narrow field-of-view mode when facing display.
Fig. 8 A illustrates is the rectangular coordinate graph of a relation of observer's light transmittance (T) of the observed adjustable LCD of driving voltage (V) and visual angle to the display panels of display when the first wide viewing angle pattern when looking side ways display.
Fig. 8 B illustrates is the rectangular coordinate graph of a relation of observer's light transmittance (T) of the observed adjustable LCD of driving voltage (V) and visual angle to the display panels of display when narrow field-of-view mode when facing display.
Fig. 9 illustrates is side schematic view according to the adjustable LCD in the visual angle of embodiments of the invention two.
Figure 10 A illustrates is the contrast contour map of the display of Fig. 9 state when being in the first wide viewing angle pattern.
Figure 10 B illustrates is the contrast contour map of the display of Fig. 9 state when being in narrow field-of-view mode.
Figure 11 illustrates is side schematic view according to the adjustable LCD in the visual angle of enforcement three of the present invention.
Figure 12 illustrates is side schematic view according to the adjustable LCD in the visual angle of embodiments of the invention four.
Figure 13 A illustrates is the liquid crystal molecule of the viewing angle adjustment device with the 3rd alignment films of Figure 12 sectional view when being in erectility.
Figure 13 B illustrates is the liquid crystal molecule of viewing angle adjustment device of Figure 13 A schematic top plan view when upright on first alignment films.
Figure 14 A illustrates is the sectional view that the liquid crystal molecule of the viewing angle adjustment device with the 3rd alignment films of Figure 12 was in for 1 when falling the state.
Figure 14 B illustrates be the liquid crystal molecule of viewing angle adjustment device of Figure 14 A on the 3rd alignment films toward the position angle schematic top plan view when 0 degree half falls.
Figure 15 A illustrates is the liquid crystal molecule of the viewing angle adjustment device with the 3rd alignment films of Figure 12 sectional view when being in lying status.
What Figure 15 B illustrated is the liquid crystal molecule schematic top plan view that past position angle 0 is spent when lying low on the 3rd alignment films of the viewing angle adjustment device of Figure 15 A.
Figure 16 illustrates is side schematic view according to the adjustable LCD in the visual angle of embodiments of the invention five.
Figure 17 illustrates is side schematic view according to the adjustable LCD in the visual angle of embodiments of the invention six.
Figure 18 illustrates is side schematic view according to the adjustable LCD in the visual angle of embodiments of the invention seven.
Figure 19 A illustrates is the liquid crystal molecule of the viewing angle adjustment device of Figure 18 sectional view when being in erectility.
What Figure 19 B illustrated is the schematic top plan view of first alignment films with two orthogonal directions of orientation of Figure 18.
What Figure 19 C illustrated is the schematic top plan view of second alignment films with two orthogonal directions of orientation of Figure 18.
Figure 19 D illustrates is that two liquid crystal molecules of viewing angle adjustment device of Figure 19 A are respectively at the schematic top plan view when upright on first oriented region and second oriented region.
Figure 20 A illustrates is the sectional view that the liquid crystal molecule of the viewing angle adjustment device of Figure 18 was in for 1 when falling the state.
Figure 20 B illustrates is two liquid crystal molecules of viewing angle adjustment device of Figure 20 A schematic top plan view when first falls respectively at first oriented region and second oriented region.
Figure 21 A illustrates is the liquid crystal molecule of the viewing angle adjustment device of Figure 18 sectional view when being in lying status.
Figure 21 B illustrates is the schematic top plan view of two liquid crystal molecules when lying low on first oriented region and second oriented region of the viewing angle adjustment device of Figure 21 A.
Figure 22 illustrates is side schematic view according to the adjustable LCD in the visual angle of embodiments of the invention eight.
Figure 23 illustrates is side schematic view according to the adjustable LCD in the visual angle of embodiments of the invention nine.
Figure 24 A illustrates is the liquid crystal molecule of the viewing angle adjustment device of Figure 23 sectional view when being in erectility.
What Figure 24 B illustrated is first insulation course of Figure 23 and the schematic top plan view of first transparency electrode.
What Figure 24 C illustrated is second insulation course of Figure 23 and the elevational schematic view of second transparency electrode.
Figure 24 D illustrates is the liquid crystal molecule of viewing angle adjustment device of Figure 24 A schematic top plan view when upright on first alignment films.
Figure 25 A illustrates is the sectional view that the liquid crystal molecule of the liquid crystal layer of first transparency electrode of Figure 23 and the part between second transparency electrode was in for 1 when falling the state.
Figure 25 B illustrates is the schematic top plan view of liquid crystal molecule when first falls in first alignment films between first transparency electrode of Figure 25 A and second transparency electrode.
Figure 26 A illustrates is the liquid crystal molecule of the liquid crystal layer of first transparency electrode of Figure 23 and the part between second transparency electrode sectional view when being in lying status.
Figure 26 B illustrates is first transparency electrode of Figure 26 A and the liquid crystal molecule between second transparency electrode schematic top plan view when lying low on first alignment films.
Figure 27 illustrates is side schematic view according to the adjustable LCD in the visual angle of embodiments of the invention ten.
Figure 28 illustrates is side schematic view according to the adjustable LCD in the visual angle of embodiments of the invention 11.
Figure 29 A illustrates is the circuit arrangement map of pel array of the viewing angle adjustment device of Figure 28.
29B illustrates is the liquid crystal molecule of the viewing angle adjustment device looked of the profile line 29B-29B ' along Figure 29 A sectional view when being in erectility.
Figure 29 C illustrates be Figure 29 B corresponding to two liquid crystal molecules of the two pixel electrodes schematic top plan view when upright on first alignment films.
Figure 30 A illustrates is the sectional view that the liquid crystal molecule of the liquid crystal layer of two pixel electrodes of Figure 28 and the part between the common electrode was in for 1 when falling the state.
Figure 30 B illustrates be Figure 30 A first falls in first alignment films corresponding to two liquid crystal molecules of two pixel electrodes the time schematic top plan view.
Figure 31 A illustrates is the liquid crystal molecule of the liquid crystal layer of two pixel electrodes of Figure 28 and the part between the common electrode sectional view when being in lying status.
Figure 31 B illustrates is two liquid crystal molecules corresponding to two pixel electrodes of Figure 31 A schematic top plan view when lying low on first alignment films.
Figure 32 illustrates is side schematic view according to the adjustable LCD in the visual angle of embodiments of the invention 12.
The simple symbol explanation
10: LCD 11: the polymer dispersion type liquid crystal device
12a: parallel 12b backlight: non-parallel backlight
13,23: display panels
20,40,50,60,80,90,100,120,130,150,160,200: display
21: backlight module 21a: exiting surface
22: the first Polarizer 22a: first
22b: second 22c: the bearing of trend of the first smooth penetrating shaft
23a: the 3rd 23b: fourth face
24,64,104,134,164: viewing angle adjustment device
25: the second Polarizer 25a: the 5th
25b: the 6th 25c: the bearing of trend of the second smooth penetrating shaft
27,107,137,167: the first transparency carriers
27a, 107a, 137a, 167a: first substrate surface
27b, 107b, 137b, 167b: second substrate surface
28,108,138,168: the second transparency carriers
28a, 108a, 138a, 168a: the 3rd substrate surface
28b, 108b, 138b, 168b: tetrabasal surface
29a, 109a, 139a: first transparency electrode
29b, 109b, 139b: second transparency electrode
30a, 110a, 140a, 180a: first alignment films
30b, 110b, 140b, 180b: second alignment films
31,71,111,141,181: liquid crystal layer
31a, 71a, 111a, 141a, 181a: liquid crystal molecule
32a, 102a, 132a, 162a: first direction of orientation
32b, 103a, 132b, 162b: second direction of orientation
41a: the first compensate film 41b: second compensate film
62a, 102b: the 3rd direction of orientation 62b, 103b: the 4th direction of orientation
67: the three transparency carrier 67a: the 5th substrate surface
67b: 68: the four transparency carriers of the 6th substrate surface
68a: the 7th substrate surface 68b: the 8th substrate surface
69a: the 3rd transparency electrode 69b: the 4th transparency electrode
70a: the 3rd alignment films 70b: the 4th alignment films
112a: the first oriented region 112b: second oriented region
113a: the 3rd oriented region 113b: the 4th oriented region
145a: the first insulation course 145b: second insulation course
146a: the first patterns of openings 146b: second patterns of openings
169b: common electrode 188: scan drive circuit
189: data drive circuit 190: sweep trace
191: data line 193: pel array
193a: presetted pixel district 194: pixel
195: thin film transistor (TFT) 196: pixel electrode
Embodiment
Embodiment one
Please refer to Fig. 2, it illustrates is side schematic view according to the adjustable LCD in the visual angle of embodiments of the invention one.In Fig. 2, display 20 comprises a backlight module 21, one first Polarizer 22, a display panels 23, a viewing angle adjustment device 24 and one second Polarizer 25.Backlight module 21 has an exiting surface 21a, and first Polarizer 22 has relative one first 22a and one second 22b.Display panels 23 has relative one the 3rd 23a and a fourth face 23b, and second Polarizer 25 has relative one the 5th 25a and one the 6th 25b.First Polarizer 22 is arranged on the exiting surface 21a towards the mode of exiting surface 21a with first 22a, and display panels 23 is arranged on second 22b towards the mode of second 22b with the 3rd 23a.Second Polarizer 25 is arranged on the fourth face 23b towards the mode of fourth face 23b with the 5th 25a, and viewing angle adjustment device 24 is arranged between second Polarizer 25 and the display panels 23.In addition, first Polarizer 22 has one first smooth penetrating shaft, and second Polarizer 25 has one second smooth penetrating shaft, and the bearing of trend 22c of the first smooth penetrating shaft is vertical with the bearing of trend 25c of the second smooth penetrating shaft.In addition, backlight module 21 is in order to provide backlight to display panels 23, allows the observer can see the picture that display panels 23 is shown from the top of the 6th 25b.In addition, display panels 23 is mainly in order to display frame, and viewing angle adjustment device 24 is in wide viewing angle pattern or narrow field-of-view mode in order to keep or to change polarization state by the light of display panels 23 with decision display 20.
As shown in Figure 3A, viewing angle adjustment device 24 comprises one first transparency carrier 27, one second transparency carrier 28, one first transparency electrode 29a, one second transparency electrode 29b, one first alignment films 30a, one second alignment films 30b and a liquid crystal layer 31.First transparency carrier 27 has one first relative substrate surface 27a and one second substrate surface 27b, the second substrate surface 27b is towards the fourth face 23b of Fig. 2, so the viewing angle adjustment device 24 of Fig. 2 is arranged on the fourth face 23b towards the mode of fourth face 23b with the second substrate surface 27b.The first transparency electrode 29a is formed on the first substrate surface 27a, the first alignment films 30a is formed on the first transparency electrode 29a, and having one first orientation (rubbing) direction 32a, the first direction of orientation 32a is parallel or vertical with the bearing of trend 22c of the first smooth penetrating shaft.In the present embodiment, the first direction of orientation 32a is parallel with the bearing of trend 22c of the first smooth penetrating shaft.Second transparency carrier 28 has one the 3rd relative substrate surface 28a and tetrabasal surface 28b, the 3rd substrate surface 28a and tetrabasal surface 28b is respectively towards the 5th 25a of second Polarizer 25 of the first substrate surface 27a and Fig. 2, so second Polarizer 25 of Fig. 2 is arranged on the surperficial 28b of tetrabasal towards the mode of tetrabasal surface 28b with the 5th 25a.The second transparency electrode 29b is formed on the 3rd substrate surface 28a, and the second alignment films 30b is formed on the second transparency electrode 29b, and has one second direction of orientation 32b, and the second direction of orientation 32b is opposite with the first direction of orientation 32a.Liquid crystal layer 31 is sealed between first transparency carrier 27 and this second transparency carrier 28, and between the first alignment films 30a and the second alignment films 30b, and having many liquid crystal molecule 31a, the thickness of supposing liquid crystal layer 31 is d.
In the present embodiment, the arrangement mode of the liquid crystal molecule 31a of liquid crystal layer 31 for example is vertical orientated (vertical alignment, VA) type.In addition, the material of first transparency carrier 27 and second transparency carrier 28 is glass or plastics, and the material of the first transparency electrode 29a and the second transparency electrode 29b is indium tin oxide (indium tin oxide, ITO) or indium-zinc oxide (indium zinc oxide, IZO), and the material of the first alignment films 30a and the second alignment films 30b be pi (polyimide, PI).In addition, display panels 23 comprises a upper substrate, an infrabasal plate and a liquid crystal layer, upper substrate comprises common electrode, colored filter, black matrix" (black matrix) and goes up alignment films that infrabasal plate comprises that a plurality of sweep traces (scan line), a plurality of data line (data line), a plurality of storage capacitors (storagecapacitor), a plurality of TFT, a plurality of pixel electrode reach alignment films down.In addition, separate upper substrate and infrabasal plate, make liquid crystal layer be sealed between upper substrate and the infrabasal plate by sept.
Shown in Fig. 3 B, in the present embodiment, the first direction of orientation 32a that supposes the first alignment films 30a by position angle (azimuth angle) 90 degree (90 °) toward position angle during 270 degree (270 °), then the second direction of orientation 32b by position angle 270 degree toward the position angle 90 degree.In addition, the bearing of trend 22c of the first smooth penetrating shaft of first Polarizer 22 of Fig. 2 is spent by the past position angle 270 of position angle 90 degree, or by the past position angle of position angle 270 degree 90 degree.In addition, 180 degree (180 °) extend the bearing of trend 25c of the second smooth penetrating shaft of second Polarizer 24 of Fig. 2 toward the position angle by position angle 0 degree (0 °), or 0 degree extends toward the position angle by position angle 180 degree.
As shown in Figure 3A, when being not applied to pressure reduction between the first transparency electrode 29a and the second transparency electrode 29b, the liquid crystal molecule 31a of liquid crystal layer 31 is arranged in a upright state, promptly on the surface of the major axis of liquid crystal molecule 31a perpendicular to the first alignment films 30a.When the observer faces display 20, because difference (difference in refractive index between the long and short axes) the Δ n of the major axis of the pairing liquid crystal molecule 31a of light that the observer saw and the refractive index of minor axis is 0, the phasic difference value (retardation, Δ nd) that expression viewing angle adjustment device 24 is provided when the observer faces display 20 is 0.At this moment, viewing angle adjustment device 24 will can not change the polarization state by the light of display panels 23, promptly can not change display panels 23 picture to brightness when, and the observer can observe the shown picture of display panels 23 when facing display 20.When the observer in the position angle 0,90,180 of Fig. 3 B or 270 degree when sentencing viewing angle θ stravismus display 20, because the difference DELTA n of the major axis of the pairing liquid crystal molecule 31a of light that the observer saw and the refractive index of minor axis also is 0, the phasic difference value Δ nd that expression viewing angle adjustment device 24 is provided when the observer looks side ways display 20 also is 0.At this moment, viewing angle adjustment device 24 will can not change the polarization state by the light of display panels 23, and the observer can observe the shown picture of display panels 23 by the mode of stravismus display 20.So when being not applied to pressure reduction between the first transparency electrode 29a of Fig. 3 A and the second transparency electrode 29b, display 20 is in one first wide viewing angle pattern, face and the observer that looks side ways display 20 all can see the picture of display 20.
Shown in Fig. 4 A, when being applied in one first pressure reduction V1 between the first transparency electrode 29a and the second transparency electrode 29b, the liquid crystal molecule 31a of liquid crystal layer 31 topples over toward position angle 90 degree along the first direction of orientation 32a, be to form an acute angle between the surface of the major axis of liquid crystal molecule 31a and the first alignment films 30a, fall state to be arranged in half, shown in Fig. 4 B.When the observer faces display 20, because the difference DELTA n of the major axis of the pairing liquid crystal molecule 31a of light that the observer saw and the refractive index of minor axis still is 0, the phasic difference value Δ nd that expression viewing angle adjustment device 24 is provided when the observer faces display 20 is 0.At this moment, the viewing angle adjustment device 24 of Fig. 4 A will can not change the polarization state by the light of the display panels 23 of Fig. 2, promptly can not change display panels 23 picture to brightness when, and the observer can observe the shown picture of display panels 23 when facing display 20.
When the observer in the position angle 90 of Fig. 3 B or 270 degree when sentencing viewing angle θ stravismus display 20, because the major axis of the pairing liquid crystal molecule 31a of light that the observer saw also is 0 with the difference DELTA n of the refractive index of minor axis, the observer can be at the position angle observes the shown picture of display panels 23 when display 20 is looked side ways at 90 or 270 degree places.Yet, when the observer at the position angle 0 of Fig. 3 B or 180 degree when sentencing viewing angle θ stravismus display 20, because the difference DELTA n of the major axis of the pairing liquid crystal molecule 31a of light that the observer saw and the refractive index of minor axis is not equal to 0, expression viewing angle adjustment device 24 is not equal to 0 at the phasic difference value Δ nd that the observer is provided when 0 or 180 degree are looked side ways displays 20 in the position angle.At this moment, viewing angle adjustment device 24 will change the polarization state by the light of display panels 23, makes the observer at the position angle during 0 or 180 degree places stravismus display 20, can't observe the shown picture of display panels 23.So, when being applied in the first pressure reduction V1 between the first transparency electrode 29a of Fig. 4 A and the second transparency electrode 29b, display 20 is in a narrow field-of-view mode, the observer who faces display 20 still can see picture, and the observer of 90 and 270 degree stravismus displays 20 can see picture from the position angle, but the observer of 0 and 180 degree stravismus displays 20 can't see picture from the position angle, reach the purpose that the visual angle narrows really.
Shown in Fig. 5 A, when being applied in one second pressure reduction V2 between the first transparency electrode 29a and the second transparency electrode 29b, 90 degree lie low the liquid crystal molecule 31a of liquid crystal layer 31 toward the position angle along the first direction of orientation 32a, it is the surface that the major axis of liquid crystal molecule 31a is parallel to the first alignment films 30a, to be arranged in a lying status, shown in Fig. 5 B.When the saturation voltage of the liquid crystal mode of liquid crystal layer 31 (promptly the first transparency electrode 29a and the second transparency electrode 29b begin the pressure reduction that is applied in when the brightest in the penetrance of liquid crystal layer 31), during for Vsat, V2 is greater than Vsat, and V1 approximates 0.5V2～0.8Vsat, and V1 is preferably 0.7Vsat.In the present embodiment, the first pressure reduction V1 and the second pressure reduction V2 are respectively 2.5 volts (V) and 5 volts.When the observer faces display 20, because the difference DELTA n of the refractive index of the major axis of the pairing liquid crystal molecule 31a of light that the observer saw and minor axis is 0, the observer can observe the shown picture of display panels 23 by the mode of facing display 20.When the observer in the position angle 0,90,180 of Fig. 5 B or 270 degree when sentencing viewing angle θ stravismus display 20, because the major axis of the pairing liquid crystal molecule 31a of light that the observer saw also is 0 with the difference DELTA n of the refractive index of minor axis, the observer can observe the shown picture of display panels 23 when looking side ways display 20.So when being applied in the second pressure reduction V2 between the first transparency electrode 29a of Fig. 5 A and the second transparency electrode 29b, display 20 is in one second wide viewing angle pattern, face and the observer that looks side ways display 20 all can see the picture of display 20.
In the present embodiment, though the liquid crystal molecule 31a of liquid crystal layer 31 turns to alignment characteristics as indicated above under electric field change, the characteristic that turn to arrangement of the liquid crystal molecule of different liquid crystal layers under electric field change will be different.For example, when being not applied to pressure reduction between the first transparency electrode 29a and the second transparency electrode 29b, the liquid crystal molecule of liquid crystal layer can be arranged in a lying status, and display is in a wide viewing angle pattern.In addition, when being applied in one the 5th pressure reduction between the first transparency electrode 29a and the second transparency electrode 29b, the liquid crystal molecule of liquid crystal layer is arranged in half along the first direction of orientation 32a and falls state, and display is in a narrow field-of-view mode.In addition, when being applied in one the 6th pressure reduction between the first transparency electrode 29a and the second transparency electrode 29b, the liquid crystal molecule of liquid crystal layer can be arranged in a upright state, and display is in a wide viewing angle pattern.Wherein, the 5th pressure reduction is less than the 6th pressure reduction.
Please refer to Fig. 6 A～6B, Fig. 6 A illustrates is the contrast contour map of the display of Fig. 2 state when being in the first wide viewing angle pattern, and Fig. 6 B illustrates is the contrast contour map of the display of Fig. 2 state when being in narrow field-of-view mode.In Fig. 6 A～6B, the contrast level line is a plurality of concentric circless from inside to outside, and the correlative value of representative is 2000,1000,500,100,50,20 and 10 in regular turn, and the correlative value of the round representative of outmost turns is 10.In addition, the definition of visual angle (view angle) is the viewing angle that correlative value equaled 10 o'clock.At Fig. 6 A,, can find to be in the visual angle at display 20 0,90,180 and 270 degree places of the first wide viewing angle pattern and all spend (80 °) above 80 in the position angle if equal 10 when be standard with correlative value.In Fig. 6 B, the visual angle that is in the display that is in the first wide viewing angle pattern 20 90 and 270 degree places in the position angle of the visual angle at display 20 90 and 270 degree places in the position angle of narrow field-of-view mode and Fig. 6 A is more or less the same, but 18 degree are but reduced to by 80 degree in the visual angle that is in display 20 0 and 180 degree places in the position angle of narrow field-of-view mode.In addition, when the observer faces display 20, observe the contrast of display 20 when the first wide viewing angle pattern and narrow field-of-view mode much at one, no difference, expression display 20 under any visual angle pattern, can not change the picture seen when the observer faces display 20 to brightness when.
Please refer to Fig. 7 A～7B, Fig. 7 A illustrates is the rectangular coordinate graph of a relation of observer's light transmittance (T) of the observed adjustable LCD of driving voltage (V) and visual angle to the display panels of display when the first wide viewing angle pattern when facing display, and Fig. 7 B illustrates is the rectangular coordinate graph of a relation of observer's light transmittance (T) of the observed adjustable LCD of driving voltage (V) and visual angle to the display panels of display when narrow field-of-view mode when facing display.In Fig. 7 A～7B, when the observer faces display 20, can observe the V-T curve of display 20 when the first wide viewing angle pattern and narrow field-of-view mode much at one, no change, expression display 20 can not change the picture of being seen when the observer faces display 20 under any visual angle pattern.
Please refer to Fig. 8 A～8B, Fig. 8 A illustrates is the rectangular coordinate graph of a relation of observer's light transmittance (T) of the observed adjustable LCD of driving voltage (V) and visual angle to the display panels of display when the first wide viewing angle pattern when looking side ways display, and Fig. 8 B illustrates is the rectangular coordinate graph of a relation of observer's light transmittance (T) of the observed adjustable LCD of driving voltage (V) and visual angle to the display panels of display when narrow field-of-view mode when facing display.In Fig. 8 A～8B, suppose that viewing angle θ is 40 degree, the observer is 40 degree places stravismus displays 20 in viewing angle.Shown in Fig. 8 A, during 0,90,180 and 270 places stravismus display 20, resulting display 20 is almost consistent corresponding to the V-T curve at position angle 0,90,180,270 at the position angle for the observer.Shown in Fig. 8 B, the observer is at the position angle during 0,90,180 and 270 places stravismus display 20, resulting display 20 is almost consistent corresponding to the V-T curve of position angle 90 and 270, and resulting display 20 is almost consistent corresponding to the V-T curve of position angle 0 and 180.Yet, display 20 almost is flat corresponding to the V-T curve of position angle 0 and 180, the light transmittances corresponding to position angle 0 and 180 degree of expression display 20 can't and then become big under the situation that the driving voltage of display panels 23 changes from small to big, cause the observer can't be from the position angle 0 and 180 pictures of seeing display panels 23, reach the purpose that the visual angle narrows.
When the observer faced display 20, tube display 20 was not in wide viewing angle pattern or narrow field-of-view mode, and the picture of the viewed display 20 of observer much at one.When the observer looks side ways display 20, and display 20 is when being in the wide viewing angle pattern, and the observer can observe the picture of display 20, i.e. the shown picture of display panels 23.When the observer looks side ways display 20, and display 20 is when being in narrow field-of-view mode, and the observer can't observe the picture of display 20, i.e. the shown picture of display panels 23.
After above-mentioned explanation, can understand the design of the viewing angle adjustment device of present embodiment, really allow the field-of-view mode of any switching display of user between wide viewing angle pattern and narrow field-of-view mode, reach the adjustable purpose in visual angle of display, and the effect of data confidentiality, promote the practicality of display widely.
Have in the technical field under the present invention and know that usually the knowledgeable can also understand that technology of the present invention is not confined to this, for example, the present invention can propose the method for the adjustable LCD in a kind of driving one visual angle, the LCD that the visual angle is adjustable comprises a viewing angle adjustment device, and viewing angle adjustment device has the saturation voltage (Vsat) of a liquid crystal mode.In the method, at first, carry out a wide viewing angle pattern, comprise that this viewing angle adjustment device produces one first pressure reduction, wherein first pressure reduction is 0Vsat or greater than Vsat.Then, carry out a narrow field-of-view mode, comprise that this viewing angle adjustment device produces one second pressure reduction, wherein second pressure reduction is 0.5Vsat to 0.8Vsat.
Embodiment two
Please refer to Fig. 9, it illustrates is side schematic view according to the adjustable LCD in the visual angle of embodiments of the invention two.The display 40 of present embodiment is that with display 20 differences of embodiment one display 40 of present embodiment also comprises one first compensate film (compensation film) 41a and one second compensate film 41b.As for all the other identical constitutive requirements, continue to continue to use old label, and repeat no more.The first compensate film 41a is arranged between first Polarizer 22 and the display panels 23, and the second compensate film 41b is arranged between second Polarizer 25 and the viewing angle adjustment device 24.The first compensate film 41a and the second compensate film 41b be in order to the light leak of the oblique dark attitude that compensates first Polarizer 22 and second Polarizer 24, and liquid crystal this look side ways the dark attitude light leak that is produced down in the observer.
Please refer to Figure 10 A～10B, Figure 10 A illustrates is the contrast contour map of the display of Fig. 9 state when being in the first wide viewing angle pattern, and Figure 10 B illustrates is the contrast contour map of the display of Fig. 9 state when being in narrow field-of-view mode.Comparison diagram 10A and Fig. 6 A because display 40 increases by the first compensate film 41a and the second compensate film 41b than display more than 20, make that the visual angle of display 40 is bigger than the visual angle of display 20, and picture are also relatively good to brightness when.Comparison diagram 10B and Fig. 6 B are because display 40, makes that the visual angle at 0 and 180 degree places in the position angle of display 40 is bigger than the visual angle at display 20 0 and 180 degree places in the position angle than display more than 20 increase by the first compensate film 41a and the second compensate film 41b.
Embodiment three
Please refer to Figure 11, it illustrates is side schematic view according to the adjustable LCD in the visual angle of embodiments of the invention three.The display 50 of present embodiment is that with display 20 differences of embodiment one display panels 23 is between the viewing angle adjustment device 24 and second Polarizer 25.Viewing angle adjustment device 24 is arranged on second 22b towards the mode of second 22b of first Polarizer 22 with the second substrate surface 27b, display panels 23 is arranged on the 28b of tetrabasal surface towards the mode of tetrabasal surface 28b with the 3rd 23a, and first Polarizer 25 is arranged on the fourth face 23b towards the mode of fourth face 23b with the 5th 25a.Right those skilled in the art can also understand that the technology of present embodiment is not confined to this, for example, between first Polarizer 22 and the viewing angle adjustment device 24 one first compensate film can be set, and between second Polarizer 25 and the display panels 23 one second compensate film can be set.
Embodiment four
Please refer to Figure 12, it illustrates is side schematic view according to the adjustable LCD in the visual angle of embodiments of the invention four.The display 60 of present embodiment is that with display 20 differences of embodiment one display 60 also comprises a viewing angle adjustment device 64.Viewing angle adjustment device 64 is arranged between the display panels 23 and first Polarizer 22, as shown in FIG. 13A, viewing angle adjustment device 64 comprises one the 3rd transparency carrier 67, one the 4th transparency carrier 68, one the 3rd transparency electrode 69a, one the 4th transparency electrode 69b, one the 3rd alignment films 70a, one the 4th alignment films 70b and a liquid crystal layer 71.The 3rd transparency carrier 67 has one the 5th relative substrate surface 67a and one the 6th substrate surface 67b, and the 5th substrate surface 67b is towards second 22b of Figure 12.The 3rd transparency electrode 69a is formed on the 5th substrate surface 67a, and the 3rd alignment films 70a is formed on the 3rd transparency electrode 69a, and has one the 3rd direction of orientation 62a, and the 3rd direction of orientation 62a is vertical with the first direction of orientation 32a of Fig. 3 A.The 4th transparency carrier 68 has one the 7th relative substrate surface 68a and one the 8th substrate surface 68b, and the 7th substrate surface 68a and the 8th substrate surface 68b are respectively towards the 3rd 23a of the 5th substrate surface 67a and Figure 12.The 4th transparency electrode 69b is formed on the 7th substrate surface 68a, and the 4th alignment films 70b is formed on the 4th transparency electrode 69b, and has one the 4th direction of orientation 62b, and the 4th direction of orientation 62b is opposite with the 3rd direction of orientation 62a.Liquid crystal layer 71 is sealed between the 3rd transparency carrier 67 and the 4th transparency carrier 68, and between the 3rd alignment films 70a and the 4th alignment films 70b, and having many liquid crystal molecule 71a, the thickness of supposing liquid crystal layer 71 is d.Shown in Figure 13 B, in the present embodiment, when the 3rd direction of orientation 62a that supposes the 3rd alignment films 70a is spent toward position angle 180 by position angle 0 degree, then the 3rd direction of orientation 62b by position angle 180 degree toward the position angle 0 degree.
Shown in Fig. 3 A and Figure 13 A, between the first transparency electrode 29a and the second transparency electrode 29b, be not applied to pressure reduction, and when being not applied to pressure reduction between the 3rd transparency electrode 69a and the 4th transparency electrode 69b, the liquid crystal molecule 31a of liquid crystal layer 31 and the liquid crystal molecule 71a of liquid crystal layer 71 all are arranged in a upright state, shown in Fig. 3 B and Figure 13 B.At this moment, the phasic difference value Δ nd that viewing angle adjustment device 24 and 64 is provided when the observer faces or looks side ways display 60 is 0, expression will can not changed by viewing angle adjustment device 24 and 64 by the polarization state of the light of viewing angle adjustment device 24 and 64, make display 60 be in one first wide viewing angle pattern.
Shown in Fig. 4 A and Figure 13 A, between the first transparency electrode 29a and the second transparency electrode 29b, be applied in the first pressure reduction V1, and when being not applied to pressure reduction between the 3rd transparency electrode 69a and the 4th transparency electrode 69b, the liquid crystal molecule 31a of liquid crystal layer 31 topples over and is arranged in one the first half and falls state along the first direction of orientation 32a, shown in Fig. 4 B, the liquid crystal molecule 71a of liquid crystal layer 71 is arranged in erectility, shown in Figure 13 B.At this moment, viewing angle adjustment device 24 is not 0 at the phasic difference value Δ nd that the observer is provided when display 60 is looked side ways at 0 or 180 degree places in the position angle, viewing angle adjustment device 24 will change the polarization state by the light of display panels 23, make the observer at the position angle during 0 or 180 degree places stravismus display 60, can't observe the shown picture of display panels 23.But the polarization state of the light by viewing angle adjustment device 64 will can not changed by viewing angle adjustment device 64, and display 60 is in one first narrow field-of-view mode.
Shown in Fig. 3 A and Figure 14 A, between the first transparency electrode 29a and the second transparency electrode 29b, be not applied to pressure reduction, and when being applied in one the 3rd pressure reduction V3 between the 3rd transparency electrode 69a and the 4th transparency electrode 69b, the liquid crystal molecule 71a of liquid crystal layer 71 topples over and is arranged in one the second half and falls state along the 3rd direction of orientation 62a, as shown in Figure 14B, the liquid crystal molecule 31a of liquid crystal layer 31 is arranged in erectility, shown in Fig. 3 B.At this moment, viewing angle adjustment device 64 is not 0 at the phasic difference value Δ nd that the observer is provided when display 60 is looked side ways at 90 or 270 degree places in the position angle, the polarization state of the light by viewing angle adjustment device 64 will be changed by viewing angle adjustment device 64, make the observer at the position angle during 90 or 270 degree places stravismus display 60, can't observe the shown picture of display panels 23.But viewing angle adjustment device 24 can not change the polarization state by the light of display panels 23, and display 60 is in one second narrow field-of-view mode.
Shown in Fig. 4 A and Figure 14 A, between the first transparency electrode 29a and the second transparency electrode 29b, be applied in the first pressure reduction V1, and when being applied in the 3rd pressure reduction V3 between the 3rd transparency electrode 69a and the 4th transparency electrode 69b, the liquid crystal molecule 31a of liquid crystal layer 31 topples over and is arranged in the first half and falls state along the first direction of orientation 32a, shown in Fig. 4 B.And the liquid crystal molecule 71a of liquid crystal layer 71 topples over and is arranged in the second half and falls state along the 3rd direction of orientation 62a, as shown in Figure 14B.At this moment, viewing angle adjustment device 24 is not 0 at the phasic difference value Δ nd that the observer is provided when display 60 is looked side ways at 0 or 180 degree places in the position angle, and viewing angle adjustment device 24 will change the polarization state by the light of display panels 23.And viewing angle adjustment device 64 is not 0 at the phasic difference value Δ nd that the observer is provided during 90 or 270 degree places stravismus display 60 in the position angle, and the polarization state of the light by viewing angle adjustment device 64 will be changed by viewing angle adjustment device 64.So the observer is at the position angle during 0,90,180 and 270 degree places stravismus display 60, all can't observe the shown picture of display panels 23, display 60 is in one the 3rd narrow field-of-view mode.
Shown in Fig. 5 A and Figure 15 A, between the first transparency electrode 29a and the second transparency electrode 29b, be applied in the second pressure reduction V2, and when being applied in one the 4th pressure reduction V4 between the 3rd transparency electrode 69a and the 4th transparency electrode 69b, the liquid crystal molecule 31a of liquid crystal layer 31 topples over along the past position angle of the first direction of orientation 32a 90 degree, to be arranged in one first lying status, shown in Fig. 5 B.And the liquid crystal molecule 71a of liquid crystal layer 71 topples over along the past position angle of the 3rd direction of orientation 62a 0 degree, to be arranged in one second lying status, shown in Figure 15 B.At this moment, the phasic difference value Δ nd that viewing angle adjustment device 24 and 64 is provided when the observer faces or looks side ways display 60 is 0, expression will can not changed by viewing angle adjustment device 24 and 64 by the polarization state of the light of viewing angle adjustment device 24 and 64, make display 60 be in one second wide viewing angle pattern.
Based on above-mentioned, as long as liquid crystal layer 31 and 71 is for lying low or erectility, display 60 will be in a wide viewing angle pattern.In addition, as long as liquid crystal layer 31 and 71 or wherein is half to fall state, display 60 will be in a narrow field-of-view mode.
In addition, when the saturation voltage of the liquid crystal mode of liquid crystal layer 71 was Vsat, the 4th pressure reduction V4 was greater than Vsat, and the 3rd pressure reduction V3 approximates 0.5Vsat～0.8Vsat, and the 3rd pressure reduction V3 is preferably 0.7Vsat.In the present embodiment, the 3rd pressure reduction V3 and the 4th pressure reduction V4 are respectively 2.5 volts (V) and 5 volts.Right those skilled in the art can also understand that the technology of present embodiment is not confined to this, for example, between first Polarizer 22 and the viewing angle adjustment device 64 one first compensate film can be set, and between second Polarizer 25 and the viewing angle adjustment device 24 one second compensate film can be set.
In the present embodiment, though the liquid crystal molecule 71a of liquid crystal layer 71 turns to alignment characteristics as indicated above under electric field change, the characteristic that turn to arrangement of the liquid crystal molecule of different liquid crystal layers under electric field change will be different.For example, when being not applied to pressure reduction between the first transparency electrode 69a and the second transparency electrode 69b, the liquid crystal molecule of liquid crystal layer can be arranged in a lying status.In addition, when being applied in one the 7th pressure reduction between the first transparency electrode 69a and the second transparency electrode 69b, the liquid crystal molecule of liquid crystal layer is arranged in half along the 3rd direction of orientation 62a and falls state.In addition, when being applied in one the 8th pressure reduction between the first transparency electrode 69a and the second transparency electrode 69b, the liquid crystal molecule of liquid crystal layer can be arranged in a upright state.Wherein, the 7th pressure reduction is less than the 8th pressure reduction.
When the liquid crystal molecule of the liquid crystal layer of two viewing angle adjustment devices for lying low or during erectility, display is in a wide viewing angle pattern.As long as the liquid crystal molecule of the liquid crystal layer of two viewing angle adjustment devices wherein at least one was 1 when falling the state, display just is in a narrow field-of-view mode, no matter the liquid crystal molecule of the liquid crystal layer of another viewing angle adjustment device for lie low, upright or state partly.
In addition, the present invention can propose the method for the adjustable LCD in a kind of driving one visual angle, the LCD that the visual angle is adjustable comprises one first viewing angle adjustment device and one second viewing angle adjustment device, and viewing angle adjustment device has the saturation voltage (Vsat) of a liquid crystal mode.In the method, at first, carry out one first wide viewing angle pattern, comprise that first viewing angle adjustment device and second viewing angle adjustment device produce one first pressure reduction and one second pressure reduction respectively, wherein first pressure reduction and second pressure reduction are 0Vsat or greater than Vsat.
Then, carry out a narrow field-of-view mode, comprise that first viewing angle adjustment device and second viewing angle adjustment device produce one first pressure reduction and one the 3rd pressure reduction, first viewing angle adjustment device and second viewing angle adjustment device respectively and produce one the 3rd pressure reduction and second pressure reduction and first viewing angle adjustment device and second viewing angle adjustment device respectively and produce the 3rd pressure reduction and one the 4th pressure reduction respectively.Wherein, the 3rd pressure reduction and the 4th pressure reduction are 0.5Vsat to 0.8Vsat, and the 3rd pressure reduction and the 4th pressure reduction are preferably 0.7Vsat.
Embodiment five
Please refer to Figure 16, it illustrates is side schematic view according to the adjustable LCD in the visual angle of embodiments of the invention five.The display 80 of present embodiment is that with display 60 differences of embodiment four viewing angle adjustment device 64 is between the viewing angle adjustment device 24 and second Polarizer 25.Viewing angle adjustment device 64 is arranged on the 28b of tetrabasal surface towards the mode of tetrabasal surface 28b with the 6th substrate surface 67b, and second Polarizer 25 is arranged on the 8th substrate surface 68b towards the mode of the 8th substrate surface 68b with the 5th 25a.Right those skilled in the art can also understand that the technology of present embodiment is not confined to this, for example, between first Polarizer 22 and the display panels 23 one first compensate film can be set, and between second Polarizer 25 and the viewing angle adjustment device 64 one second compensate film can be set.
Embodiment six
Please refer to Figure 17, it illustrates is side schematic view according to the adjustable LCD in the visual angle of embodiments of the invention six.The display 90 of present embodiment is with display 60 differences of embodiment four, viewing angle adjustment device 24 is arranged on the 8th substrate surface 68b towards the mode of the 8th substrate surface 68b with the second substrate surface 27b at viewing angle adjustment device 24 between viewing angle adjustment device 64 and the display panels 23, and display panels 23 is arranged on the 28b of tetrabasal surface towards the mode of tetrabasal surface 28b with the 3rd 23a.Right those skilled in the art can also understand that the technology of present embodiment is not confined to this, for example, between first Polarizer 22 and the viewing angle adjustment device 64 one first compensate film can be set, and between second Polarizer 25 and the display panels 23 one second compensate film can be set.
Embodiment seven
Please refer to Figure 18, it illustrates is side schematic view according to the adjustable LCD in the visual angle of embodiments of the invention seven.The display 100 of present embodiment and display 20 differences of embodiment one are the design of viewing angle adjustment device 104, and viewing angle adjustment device 104 is arranged between the display panels 23 and second Polarizer 25.Shown in Figure 19 A, viewing angle adjustment device 104 comprises one first transparency carrier 107, one second transparency carrier 108, one first transparency electrode 109a, one second transparency electrode 109b, one first alignment films 110a, one second alignment films 110b and a liquid crystal layer 111.First transparency carrier 107 has one first relative substrate surface 107a and one second substrate surface 107b, and the second substrate surface 107b is towards the fourth face 23b of Figure 18.The first transparency electrode 109a is formed on the first substrate surface 107a, and the first alignment films 110a is formed on the first transparency electrode 109a.The first alignment films 110a has at least one first oriented region 112a and one second oriented region 112b, and the first oriented region 112a and the second oriented region 112b have one first direction of orientation 102a and one second direction of orientation 103a respectively.The first direction of orientation 102a is parallel or vertical with the bearing of trend 22c of the first smooth penetrating shaft, and the second direction of orientation 103a is vertical with the second direction of orientation 102a, shown in Figure 19 B.In the present embodiment, the first direction of orientation 102a is parallel with the bearing of trend 22c of the first smooth penetrating shaft.Second transparency carrier 108 has one the 3rd relative substrate surface 108a and tetrabasal surface 108b, and the 3rd substrate surface 108a and tetrabasal surface 108b are respectively towards the 5th 25a of the first substrate surface 107a and Figure 18.The second transparency electrode 109b is formed on the 3rd substrate surface 108a, and the second alignment films 110b is formed on the second transparency electrode 109b, and has at least one the 3rd oriented region 113a and one the 4th oriented region 113b.The 3rd oriented region 113a and the 4th oriented region 113b correspond respectively to the first oriented region 112a and the second oriented region 112b, and have one the 3rd direction of orientation 102b and one the 4th direction of orientation 103b respectively, the 3rd direction of orientation 102b and the 4th direction of orientation 103b difference first direction of orientation 102a and the second direction of orientation 103a are opposite, shown in Figure 19 C.Liquid crystal layer 111 is sealed between first transparency carrier 107 and second transparency carrier 108, and between the first alignment films 110a and the second alignment films 110b, and having many liquid crystal molecule 111a, the thickness of supposing liquid crystal layer 111 is d.Shown in Figure 19 D, in the present embodiment, suppose that the first direction of orientation 102a is by the past position angle of position angle 90 degree 270 degree, and when the second direction of orientation 103a is spent toward position angle 180 by position angle 0 degree, then the 3rd direction of orientation 102b is spent by the past position angle 90 of position angle 270 degree, and the 4th direction of orientation 103b is by the past position angle of position angle 180 degree 0 degree.
Shown in Figure 19 A, when being not applied to pressure reduction between the first transparency electrode 109a and the second transparency electrode 109b, the liquid crystal molecule 111a of liquid crystal layer 111 is arranged in a upright state, shown in Figure 19 D.At this moment, the phasic difference value Δ nd that viewing angle adjustment device 104 is provided when the observer faces or looks side ways display 100 is 0, expression viewing angle adjustment device 104 can not change the polarization state by the light of display panels 23, makes display 100 be in one first wide viewing angle pattern.
Shown in Figure 20 A, when being applied in the first pressure reduction V1 between the first transparency electrode 109a and the second transparency electrode 109b, the liquid crystal molecule 111a of the liquid crystal layer 111 of the part between the first oriented region 112a and the 3rd oriented region 113a along the first direction of orientation 102a toward position angle 90 degree topple over, fall state to be arranged in one the first half.And, the liquid crystal molecule 111a of the liquid crystal layer 111 of the another part between the second oriented region 112b and the 4th oriented region 113b along the second direction of orientation 103a toward position angle 0 degree topple over, fall state to be arranged in one the second half, shown in Figure 20 B.At this moment, viewing angle adjustment device 104 is not 0 at the phasic difference value Δ nd that the observer is provided when display 100 is looked side ways at 0,90,180 and 270 degree places in the position angle, viewing angle adjustment device 104 will change the polarization state by the light of display panels 23, make the observer at the position angle during 0,90,180 and 270 degree places stravismus display 100, all can't observe the shown picture of display panels 23.So display 100 is in a narrow field-of-view mode.
Shown in Figure 21 A, when being applied in the second pressure reduction V2 between the first transparency electrode 109a and the second transparency electrode 109b, the liquid crystal molecule 111a of the liquid crystal layer 111 of the part between the first oriented region 112a and the 3rd oriented region 113a topples over along the past position angle of the first direction of orientation 102a 90 degree, to be arranged in one first lying status.And the liquid crystal molecule 111a of the liquid crystal layer 111 of the another part between the second oriented region 112b and the 4th oriented region 113b topples over along the past position angle of the second direction of orientation 103a 0 degree, to be arranged in one second lying status, shown in Figure 21 B.At this moment, the phasic difference value Δ nd that viewing angle adjustment device 104 is provided when the observer faces or looks side ways display 100 is 0, expression viewing angle adjustment device 104 can not change the polarization state by the light of display panels 23, makes display 100 be in one second wide viewing angle pattern.
In addition, when the saturation voltage of the liquid crystal mode of liquid crystal layer 111 was Vsat, the second pressure reduction V2 was greater than Vsat, and the first pressure reduction V1 is about 0.5Vsat～0.8Vsat, and the first pressure reduction V1 is preferably 0.7Vsat.In the present embodiment, the first pressure reduction V1 and the second pressure reduction V2 are respectively 2.5 volts (V) and 5 volts.Right those skilled in the art can also understand that the technology of present embodiment is not confined to this, for example, between first Polarizer 22 and the display panels 23 one first compensate film can be set, and between second Polarizer 25 and the viewing angle adjustment device 104 one second compensate film can be set.
In the present embodiment, though the liquid crystal molecule 111a of liquid crystal layer 111 turns to alignment characteristics as indicated above under electric field change, the characteristic that turn to arrangement of the liquid crystal molecule of different liquid crystal layers under electric field change will be different.
For example, when being not applied to pressure reduction between the first transparency electrode 109a and the second transparency electrode 109b, the liquid crystal molecule of liquid crystal layer can be arranged in a lying status.
When being applied in one the 9th pressure reduction between the first transparency electrode 109a and the second transparency electrode 109b, the liquid crystal molecule of the liquid crystal layer of the part between the first oriented region 112a and the 3rd oriented region 113a is arranged in one the first half along the first direction of orientation 102a and falls state.And the liquid crystal molecule of the liquid crystal layer of the another part between the second oriented region 112b and the 4th oriented region 113b is arranged in one the second half along the second direction of orientation 103a and falls state.
When being applied in 1 the tenth pressure reduction between the first transparency electrode 109a and the second transparency electrode 109b, the liquid crystal molecule of the liquid crystal layer of the part between the first oriented region 112a and the 3rd oriented region 113a is listed as into one first erectility along the first direction of orientation 102a.And the liquid crystal molecule of the liquid crystal layer of the another part between the second oriented region 112b and the 4th oriented region 113b is arranged in one second erectility along the second direction of orientation 103a.Wherein, the 9th pressure reduction is less than the tenth pressure reduction.
When the liquid crystal molecule of the liquid crystal layer of the part between the first oriented region 112a and the 3rd oriented region 113a for lying low or during erectility, display is in a wide viewing angle pattern.The liquid crystal molecule of the liquid crystal layer of the part between the first oriented region 112a and the 3rd oriented region 113a was 1 when falling the state, and display is in a narrow field-of-view mode
Embodiment eight
Please refer to Figure 22, it illustrates is side schematic view according to the adjustable LCD in the visual angle of embodiments of the invention eight.The display 120 of present embodiment is that with display 100 differences of embodiment seven display panels 23 is between the viewing angle adjustment device 104 and second Polarizer 25.Viewing angle adjustment device 104 is arranged on second 22b towards the mode of second 22b with the second substrate surface 107b, display panels 23 is arranged on the 108b of tetrabasal surface towards the mode of tetrabasal surface 108b with the 3rd 23a, and first Polarizer 25 is arranged on the fourth face 23b towards the mode of fourth face 23b with the 5th 25a.Right those skilled in the art can also understand that the technology of present embodiment is not confined to this, for example, between first Polarizer 22 and the viewing angle adjustment device 104 one first compensate film can be set, and between second Polarizer 25 and the display panels 23 one second compensate film can be set.
Embodiment nine
Please refer to Figure 23, it illustrates is side schematic view according to the adjustable LCD in the visual angle of embodiments of the invention nine.The display 130 of present embodiment and display 20 differences of embodiment one are the design of viewing angle adjustment device 134, and viewing angle adjustment device 134 is arranged between the display panels 23 and second Polarizer 25.Shown in Figure 24 A, viewing angle adjustment device 134 comprises one first transparency carrier 137, one second transparency carrier 138, one first insulation course 145a, one second insulation course 145b, one first transparency electrode 139a, one second transparency electrode 139b, one first alignment films 140a, one second alignment films 140b and a liquid crystal layer 141.First transparency carrier 137 has one first relative substrate surface 137a and one second substrate surface 137b, and the second substrate surface 137b is towards the fourth face 23b of Figure 23.The first insulation course 145a is formed on the first substrate surface 137a, and has one first patterns of openings 146a, shown in Figure 24 B.The first patterns of openings 146a can be literal, trade mark or sign, and in the present embodiment, the first patterns of openings 146a for example is a square pattern.The first transparency electrode 139a is formed among the first patterns of openings 146a, and the shape of the first transparency electrode 139a is corresponding to the pattern form of the first patterns of openings 146a.The first alignment films 140a is formed on the first transparency electrode 139a and the first insulation course 145a, and has one first direction of orientation 132a, and the first direction of orientation 132a is parallel or vertical with the bearing of trend 22c of the first smooth penetrating shaft.In the present embodiment, the first direction of orientation 132a is parallel with the bearing of trend 22c of the first smooth penetrating shaft.Second transparency carrier 138 has one the 3rd relative substrate surface 138a and tetrabasal surface 138b, and the 3rd substrate surface 138a and tetrabasal surface 138b are respectively towards the 5th 25a of the first substrate surface 137a and Figure 23.The second insulation course 145b is formed on the 3rd substrate surface 138a, and has second a patterns of openings 146b corresponding to the first patterns of openings 146a, shown in Figure 24 C.In the present embodiment, the second patterns of openings 146b for example is a square pattern.The second transparency electrode 139b is formed among the second patterns of openings 146b, and the shape of the second transparency electrode 139b is corresponding to the pattern form of the second patterns of openings 146b, and promptly the shape of the second transparency electrode 139b is corresponding to the shape of the first transparency electrode 139a.The second alignment films 140b is formed on the second transparency electrode 139b and the second insulation course 145b, and has one second direction of orientation 132b, and the second direction of orientation 132b is opposite with the first direction of orientation 132a.Liquid crystal layer 141 is sealed between first transparency carrier 137 and second transparency carrier 138, and between the first alignment films 140a and the second alignment films 140b, and having many liquid crystal molecule 141a, the thickness of supposing liquid crystal layer 141 is d.Shown in Figure 24 D, when supposing the first direction of orientation 132a by the past position angle of position angle 90 degree 270 degree (270 °), then the second direction of orientation 132b is by the past position angle of position angle 270 degree 90 degree.
Shown in Figure 24 A, when being not applied to pressure reduction between the first transparency electrode 139a and the second transparency electrode 139b, the liquid crystal molecule 141a of liquid crystal layer 141 is arranged in a upright state, shown in Figure 24 D.At this moment, the phasic difference value Δ nd that viewing angle adjustment device 134 is provided when the observer faces or looks side ways display 100 is 0, expression viewing angle adjustment device 134 can not change the polarization state by the light of display panels 23, makes display 130 be in one first wide viewing angle pattern.
Shown in Figure 25 A, when being applied in one first pressure reduction between the first transparency electrode 139a and the second transparency electrode 139b, the liquid crystal molecule 141a of the liquid crystal layer 141 of the part between the first transparency electrode 139a and the second transparency electrode 139b topples over along the past position angle of the first direction of orientation 132a 90 degree, fall state to be arranged in half, shown in Figure 25 B.At this moment, viewing angle adjustment device 134 is not 0 at the phasic difference value Δ nd that the observer is provided when display 130 is looked side ways at 0 and 180 degree places in the position angle, viewing angle adjustment device 134 will change the polarization state by the light of display panels 23, make the observer at the position angle during 0 and 180 degree places stravismus display 130, see having a white space corresponding to the shape of the first transparency electrode 139a in the shown picture of display panels 23.So display 130 is in a narrow field-of-view mode, but can allow the observer see white space corresponding to the shape of the first transparency electrode 139a.
Shown in Figure 26 A, when being applied in one second pressure reduction between the first transparency electrode 139a and the second transparency electrode 139b, the liquid crystal molecule 141a of the liquid crystal layer 141 of the part between the first transparency electrode 139a and the second transparency electrode 139b topples over along the past position angle of the first direction of orientation 102a 90 degree, to be arranged in a lying status, shown in Figure 26 B.At this moment, the phasic difference value Δ nd that viewing angle adjustment device 134 is provided when the observer faces or looks side ways display 130 is 0, expression viewing angle adjustment device 134 can not change the polarization state by the light of display panels 23, makes display 130 be in one second wide viewing angle pattern.In addition, when the saturation voltage of the liquid crystal mode of liquid crystal layer 141 was Vsat, second pressure reduction was greater than Vsat, and first pressure reduction is about 0.5Vsat～0.8Vsat, and first pressure reduction is preferably 0.7Vsat.In the present embodiment, first pressure reduction and second pressure reduction are respectively 2.5 volts (V) and 5 volts.
When display 130 was in the wide viewing angle pattern, the observer all can face or look side ways from different orientations the picture of display 130.When display 130 was in narrow field-of-view mode, the observer can only be under the situation with position angle 0 and 180 degree places stravismus display 130, observed to have a white space corresponding to the shape of the first transparency electrode 139a in the picture.In addition, the shape of the first transparency electrode 139a can be designed to a literal, trade mark or sign, make the observer can be when display 130 is in narrow field-of-view mode from the position angle 0 and 180 degree or other position angle when looking side ways display 130, see in the picture of display 130 being interspersed with this literal, trade mark or sign, promote the practicality of display 130 widely.Right those skilled in the art can also understand that the technology of present embodiment is not confined to this, for example, between first Polarizer 22 and the display panels 23 one first compensate film can be set, and between second Polarizer 25 and the viewing angle adjustment device 134 one second compensate film can be set.
In the present embodiment, though the liquid crystal molecule 141a of liquid crystal layer 141 turns to alignment characteristics as indicated above under electric field change, the characteristic that turn to arrangement of the liquid crystal molecule of different liquid crystal layers under electric field change will be different.
For example, when being not applied to pressure reduction between the first transparency electrode 139a and the second transparency electrode 139b, the Liquid Crystal Molecules Alignment of liquid crystal layer becomes a lying status.
When being applied in 1 the 11 pressure reduction between the first transparency electrode 139a and the second transparency electrode 139b, the liquid crystal molecule of the liquid crystal layer of the part between the first transparency electrode 139a and the second transparency electrode 139b is arranged in half along the first direction of orientation 132a and falls state.
When being applied in 1 the 12 pressure reduction between the first transparency electrode 139a and the second transparency electrode 139b, the Liquid Crystal Molecules Alignment of the liquid crystal layer of the part between the first transparency electrode 139a and the second transparency electrode 139b becomes a upright state.Wherein, the 11 pressure reduction is less than the 12 pressure reduction.
In addition, between first Polarizer 22 and second Polarizer 25 of display 130, also can plant just like visual angle tunable arrangement 24 shown in the embodiment one or the visual angle tunable arrangement 104 shown in embodiment seven, with the adjustable purpose in the visual angle that reaches display 130.
Embodiment ten
Please refer to Figure 27, it illustrates is side schematic view according to the adjustable LCD in the visual angle of embodiments of the invention ten.The display 150 of present embodiment is that with display 130 differences of embodiment nine display panels 23 is between the viewing angle adjustment device 134 and second Polarizer 25.Viewing angle adjustment device 134 is arranged on second 22b towards the mode of second 22b with the second substrate surface 137b, display panels 23 is arranged on the 138b of tetrabasal surface towards the mode of tetrabasal surface 138b with the 3rd 23a, first Polarizer 25 with the 5th 25a towards the mode of fourth face 23b be arranged on the fourth face 23b.Right those skilled in the art can also understand that the technology of present embodiment is not confined to this, for example, between first Polarizer 22 and the viewing angle adjustment device 134 one first compensate film can be set, and between second Polarizer 25 and the display panels 23 one second compensate film can be set.
Embodiment 11
Please refer to Figure 28, it illustrates is schematic side view according to the adjustable LCD in the visual angle of embodiments of the invention 11.The display 160 of present embodiment is that with display 20 differences of embodiment one viewing angle adjustment device 164 has pel array (pixel array matrix) design, and present embodiment is that example explains with active formula pel array.In Figure 28, viewing angle adjustment device 164 is arranged between the display panels 23 and second Polarizer 25.Shown in Figure 29 A～29B, viewing angle adjustment device 164 comprises one first transparency carrier 167, one second transparency carrier 168, a pel array 193, community electrode 169b, one first alignment films 170a, one second alignment films 170b and a liquid crystal layer 171.Viewing angle adjustment device 164 also comprises scan driving circuit 188, a data drive circuit 189, multi-strip scanning line 190 and many data lines 191, and sweep trace 190 and data line 191 define pel array 193, and pel array 193 has a plurality of pixels 194.Each pixel 194 has a thin film transistor (TFT) 195 and a pixel electrode 196 of mutual electrical connection, each thin film transistor (TFT) 195 and corresponding one scan line 190 and a data line 191 electrical connections.In addition, sweep trace 190 is electrically connected with scan drive circuit 188, and data line 191 is electrically connected with data drive circuit 1 88.Scan drive circuit 188 is in order to drive all thin film transistor (TFT)s 195 via sweep trace 190, and data drive circuit 189 usefulness are so that have pressure reduction or do not have pressure reduction between each pixel electrode 169 and the common electrode 169b.
Shown in Figure 29 B, first transparency carrier 167 has one first relative substrate surface 167a and one second substrate surface 167b, and the sweep trace 190 of Figure 29 A, data line 191, pel array 193, thin film transistor (TFT) 165 and pixel electrode 196 are formed on the first substrate surface 167a.The first alignment films 170a covers pixel electrode 196, and has one first direction of orientation 162a.The first direction of orientation 162a is parallel or vertical with the bearing of trend 22c of the first smooth penetrating shaft, and in the present embodiment, the first direction of orientation 162a is parallel with the bearing of trend 22c of the first smooth penetrating shaft.Second transparency carrier 168 has one the 3rd relative substrate surface 168a and tetrabasal surface 168b, the 3rd substrate surface 168a towards first substrate surface, 167, the tetrabasals surface 168b towards the 5th 25a.Common electrode 169b is formed on the 3rd substrate surface 168a, and the second alignment films 170b covers common electrode 169b, and has second a direction of orientation 162b opposite with the first direction of orientation 162a.Liquid crystal layer 181 is sealed between first transparency carrier 167 and second transparency carrier 168, and between the first alignment films 170a and the second alignment films 170b.Liquid crystal layer 181 is arranged in pixel 194, and has a plurality of liquid crystal molecule 181a.Shown in Figure 29 C, when supposing the first direction of orientation 162a by the past position angle of position angle 90 degree 270 degree (270 °), then the second direction of orientation 162b is by the past position angle of position angle 270 degree 90 degree.
By the driving of scan drive circuit 188 and data drive circuit 189, be a presetted pixel district 193a corresponding to literal, trade mark or sign with the pixel 194 that dynamically determines part.In the present embodiment, presetted pixel district 193a for example comprises two pixels 196.Right those skilled in the art can also understand that the technology of present embodiment is not confined to this, and for example, present embodiment also can be in the design of passive pixel, and the pixel that dynamically determines part is a presetted pixel district corresponding to literal, trade mark or sign.
Shown in Figure 29 B, when being not applied to pressure reduction between all pixel electrodes 191 and the common electrode 169b, the liquid crystal molecule 181a of liquid crystal layer 181 is arranged in a upright state, shown in Figure 29 C.At this moment, the phasic difference value Δ nd that viewing angle adjustment device 164 is provided when the observer faces or looks side ways display 100 is 0, expression viewing angle adjustment device 164 can not change the polarization state by the light of display panels 23, makes display 160 be in one first wide viewing angle pattern.
Shown in Figure 30 A, between two pixel electrodes 196 of the presetted pixel district of Figure 29 A 193a and common electrode 139b, has one first pressure reduction, and when being not applied to pressure reduction between other pixel electrode 196 and the common electrode 139b, the liquid crystal molecule 181a of the liquid crystal layer 181 of the part between the common electrode 169b of two pixel electrode 169a and part topples over along the past position angle of the first direction of orientation 132a 90 degree, fall state to be arranged in half, shown in Figure 30 B.And the liquid crystal molecule 181a of the liquid crystal layer 181 of the part between other pixel electrode 196 and the common electrode 139b is in a upright state.At this moment, viewing angle adjustment device 164 is not 0 at the phasic difference value Δ nd that the observer is provided when display 130 is looked side ways at 0 and 180 degree places in the position angle, viewing angle adjustment device 164 will change the polarization state by the light of display panels 23, make the observer at the position angle during 0 and 180 degree places stravismus display 160, see in the shown picture of display panels 23 having a white space corresponding to presetted pixel district 193a.So display 160 is in a narrow field-of-view mode, 0 and 180 observers that spend stravismus displays 160 see having a white space corresponding to presetted pixel district 193a the picture but can allow from the position angle.
Shown in Figure 31 A, between two pixel electrodes 196 of the presetted pixel district of Figure 29 A 193a and common electrode 139b, has one second pressure reduction, and when being not applied to pressure reduction between other pixel electrode 196 and the common electrode 139b, 90 degree lie low the liquid crystal molecule 181a of the liquid crystal layer 181 of the part between the common electrode 169b of two pixel electrode 169a and part toward the position angle along the first direction of orientation 132a, to be arranged in a lying status, shown in Figure 31 B.And the liquid crystal molecule 181a of the liquid crystal layer 181 of the part between other pixel electrode 196 and the common electrode 139b is in a upright state.At this moment, the phasic difference value Δ nd that viewing angle adjustment device 164 is provided when the observer faces or looks side ways display 160 is 0, expression viewing angle adjustment device 164 can not change the polarization state by the light of display panels 23, makes display 160 be in one second wide viewing angle pattern.
In addition, when the saturation voltage of the liquid crystal mode of liquid crystal layer 181 was Vsat, second pressure reduction was greater than Vsat, and first pressure reduction is about 0.5Vsat～0.8Vsat, and first pressure reduction is preferably 0.7Vsat.In the present embodiment, first pressure reduction and second pressure reduction are respectively 2.5 volts (V) and 5 volts.In addition, presetted pixel district 193a is subjected to the control of scan drive circuit 188 and data drive circuit 189 and is designed to a literal, trade mark or sign, make the observer can be when display 160 is in narrow field-of-view mode from the position angle 0 and 180 degree or other position angle when looking side ways display 160, see this literal, trade mark or sign, promote the practicality of display widely.Right those skilled in the art can also understand that the technology of present embodiment is not confined to this, for example, between first Polarizer 22 and the display panels 23 one first compensate film can be set, and between second Polarizer 25 and the viewing angle adjustment device 164 one second compensate film can be set.
In the present embodiment, though the liquid crystal molecule 181a of liquid crystal layer 181 turns to alignment characteristics as indicated above under electric field change, the characteristic that turn to arrangement of the liquid crystal molecule of different liquid crystal layers under electric field change will be different.
For example, when being not applied to pressure reduction between all pixel electrodes 191 and the common electrode 169b, the Liquid Crystal Molecules Alignment of liquid crystal layer becomes a lying status.
Between two pixel electrodes 196 of presetted pixel district 193a and common electrode 139b, has 1 the 13 pressure reduction, and when being not applied to pressure reduction between other pixel electrode 196 and the common electrode 139b, the liquid crystal molecule of the liquid crystal layer of the part between the common electrode 169b of two pixel electrode 169a and part along the first direction of orientation 132a toward position angle 90 degree topple over, fall state to be arranged in half.And the liquid crystal molecule of the liquid crystal layer of the part between other pixel electrode 196 and the common electrode 139b is in a lying status.
Between two pixel electrodes 196 of presetted pixel district 193a and common electrode 139b, has 1 the 14 pressure reduction, and when being not applied to pressure reduction between other pixel electrode 196 and the common electrode 139b, the liquid crystal molecule of the liquid crystal layer of the part between the common electrode 169b of two pixel electrode 169a and part is along being arranged in a upright state.Wherein, the 13 pressure reduction is less than the 14 pressure reduction.
In addition, between first Polarizer 22 and second Polarizer 25 of display 150, also can plant just like visual angle tunable arrangement 24 shown in the embodiment one or the visual angle tunable arrangement 104 shown in embodiment seven, with the adjustable purpose in the visual angle that reaches display 150.
Embodiment 12
Please refer to Figure 32, it illustrates is side schematic view according to the adjustable LCD in the visual angle of embodiments of the invention 12.The display 200 of present embodiment is that with display 160 differences of embodiment 11 display panels 23 is between the viewing angle adjustment device 164 and second Polarizer 25.Viewing angle adjustment device 164 is arranged on second 22b towards the mode of second 22b with the second substrate surface 167b, display panels 23 is arranged on the 168b of tetrabasal surface towards the mode of tetrabasal surface 168b with the 3rd 23a, and first Polarizer 25 is arranged on the fourth face 23b towards the mode of fourth face 23b with the 5th 25a.Right those skilled in the art can also understand that the technology of present embodiment is not confined to this, for example, between first Polarizer 22 and the viewing angle adjustment device 164 one first compensate film can be set, and between second Polarizer 25 and the display panels 23 one second compensate film can be set.
The LCD that the disclosed visual angle of the above embodiment of the present invention is adjustable, the design of its viewing angle adjustment device, can positively allow the field-of-view mode of any switching liquid crystal display of user between wide viewing angle pattern and narrow field-of-view mode, reach the adjustable purpose in visual angle of LCD.Thus, not only can ensure individual's privacy, also can keep the high confidentiality of data, promote the practicality of LCD widely.In addition, the design of the viewing angle adjustment device of present embodiment, when the field-of-view mode of user's switching liquid crystal display, can't change LCD to brightness when, allow the user that faces LCD can not discover the variation to brightness when of LCD, keep the good running quality of LCD.
Though the present invention discloses as above with preferred embodiment; yet it is not in order to limit the present invention; those skilled in the art can do a little change and retouching without departing from the spirit and scope of the present invention, thus protection scope of the present invention should with accompanying Claim the person of being defined be as the criterion.

Claims (10)

1. LCD that the visual angle is adjustable comprises:
One backlight module;
One first Polarizer and one second Polarizer are arranged on this backlight module; And
One first viewing angle adjustment device and a display panels all are arranged between this first Polarizer and this second Polarizer, and this first viewing angle adjustment device comprises:
One first transparency carrier;
One first transparency electrode is formed on this first transparency carrier;
One first alignment films is formed on this first transparency electrode;
One first liquid crystal layer is arranged on this first alignment films;
One second alignment films is arranged on this first liquid crystal layer;
One second transparency electrode is arranged on this first liquid crystal layer, and this second alignment films is formed at the lower surface of this second transparency electrode; And
One second transparency carrier is arranged on this first liquid crystal layer, and with this first transparency carrier this first liquid crystal layer is sealed, and this second transparency electrode is formed at the lower surface of this second transparency carrier.
2. LCD as claimed in claim 1, wherein this display panels is arranged between this first Polarizer and this first viewing angle adjustment device.
3. LCD as claimed in claim 2 also comprises:
One first compensate film is arranged between this first Polarizer and this display panels; And
One second compensate film is arranged between this second Polarizer and this first viewing angle adjustment device.
4. LCD as claimed in claim 2, wherein the light penetrating shaft of this first Polarizer is vertical with the light penetrating shaft of this second Polarizer, this first alignment films comprises one first oriented region and one second oriented region, this second alignment films comprises one the 3rd oriented region and one the 4th oriented region, this first oriented region and this second oriented region correspond respectively to the 3rd oriented region and the 4th oriented region, the direction of orientation of this first oriented region is parallel or vertical with the light penetrating shaft of this first Polarizer, the direction of orientation of this second oriented region is opposite with the direction of orientation of this first oriented region, the direction of orientation of the 3rd alignment films is opposite with the direction of orientation of this first oriented region, and the direction of orientation of the 4th oriented region is opposite with the direction of orientation of this second oriented region.
5. LCD as claimed in claim 2, wherein the light penetrating shaft of this first Polarizer is vertical with the light penetrating shaft of this second Polarizer, the direction of orientation of this first alignment films is parallel or vertical with the light penetrating shaft of this first Polarizer, the direction of orientation of this first alignment films is opposite with the direction of orientation of this second alignment films, and this LCD also comprises:
One second viewing angle adjustment device is arranged between this first Polarizer and this display panels, and this second viewing angle adjustment device comprises:
One the 3rd transparency carrier;
One the 3rd transparency electrode is formed on the 3rd transparency carrier;
One the 3rd alignment films is formed on the 3rd transparency electrode, and the direction of orientation of the 3rd alignment films is vertical with the direction of orientation of this first alignment films;
One second liquid crystal layer is arranged on the 3rd alignment films;
One the 4th alignment films is arranged on this second liquid crystal layer, and the direction of orientation of the 4th alignment films is opposite with the direction of orientation of the 3rd alignment films;
One the 4th transparency electrode be arranged on this second liquid crystal layer, and the 4th alignment films is formed at the lower surface of the 4th transparency electrode; And
One the 4th transparency carrier is arranged on this second liquid crystal layer, and with the 3rd transparency carrier this second liquid crystal layer is sealed, and the 4th transparency electrode is formed at the lower surface of the 4th transparency carrier.
6. LCD as claimed in claim 2, wherein the light penetrating shaft of this first Polarizer is vertical with the light penetrating shaft of this second Polarizer, the direction of orientation of this first alignment films is parallel or vertical with the light penetrating shaft of this first Polarizer, the direction of orientation of this first alignment films is opposite with the direction of orientation of this second alignment films, and this LCD also comprises:
One second viewing angle adjustment device is arranged between this second Polarizer and this first viewing angle adjustment device, and this second viewing angle adjustment device comprises:
One the 3rd transparency carrier;
One the 3rd transparency electrode is formed on the 3rd transparency carrier;
One the 3rd alignment films is formed on the 3rd transparency electrode, and the direction of orientation of the 3rd alignment films is vertical with the direction of orientation of this first alignment films;
One second liquid crystal layer is arranged on the 3rd alignment films;
One the 4th alignment films is arranged on this second liquid crystal layer, and the direction of orientation of the 4th alignment films is opposite with the direction of orientation of the 3rd alignment films;
One the 4th transparency electrode be arranged on this second liquid crystal layer, and the 4th alignment films is formed at the lower surface of the 4th transparency electrode; And
One the 4th transparency carrier is arranged on this second liquid crystal layer, and with the 3rd transparency carrier this second liquid crystal layer is sealed, and the 4th transparency electrode is formed at the lower surface of the 4th transparency carrier.
7. LCD as claimed in claim 1, wherein this display panels is arranged between this second Polarizer and this first viewing angle adjustment device.
8. LCD as claimed in claim 7, wherein the light penetrating shaft of this first Polarizer is vertical with the light penetrating shaft of this second Polarizer, the direction of orientation of this first alignment films is parallel or vertical with the light penetrating shaft of this first Polarizer, the direction of orientation of this first alignment films is opposite with the direction of orientation of this second alignment films, and this LCD also comprises:
One second viewing angle adjustment device is arranged between this first Polarizer and this first viewing angle adjustment device, and this second viewing angle adjustment device comprises:
One the 3rd transparency carrier;
One the 3rd transparency electrode is formed on the 3rd transparency carrier;
One the 3rd alignment films is formed on the 3rd transparency electrode, and the direction of orientation of the 3rd alignment films is vertical with the direction of orientation of this first alignment films;
One second liquid crystal layer is arranged on the 3rd alignment films;
One the 4th alignment films is arranged on this second liquid crystal layer, and the direction of orientation of the 4th alignment films is opposite with the direction of orientation of the 3rd alignment films;
One the 4th transparency electrode be arranged on this second liquid crystal layer, and the 4th alignment films is formed at the lower surface of the 4th transparency electrode; And
One the 4th transparency carrier is arranged on this second liquid crystal layer, and with the 3rd transparency carrier this second liquid crystal layer is sealed, and the 4th transparency electrode is formed at the lower surface of the 4th transparency carrier.
9. LCD as claimed in claim 1, wherein this first viewing angle adjustment device also comprises:
One first insulation course is formed on this first transparency carrier, and has one first patterns of openings, and this first transparency electrode is formed in this first patterns of openings; And
One second insulation course is arranged at the lower surface of this second transparency carrier, and has second patterns of openings corresponding to this first patterns of openings, and this second transparency electrode is formed in this second patterns of openings.
10. LCD as claimed in claim 1, wherein this first viewing angle adjustment device also comprises:
The multi-strip scanning line is formed on this first transparency carrier;
Many data lines are formed on this first transparency carrier, and define a pel array with those sweep traces, and this pel array has a plurality of pixels, and those pixels of part constitute a presetted pixel district;
A plurality of thin film transistor (TFT)s are formed on this first transparency carrier, and respectively this thin film transistor (TFT) is arranged in respectively this pixel, and are electrically connected with corresponding this sweep trace and this data line;
Scan driving circuit is electrically connected with those thin film transistor (TFT)s; And
One data drive circuit is electrically connected with those thin film transistor (TFT)s;
Wherein, this first transparency electrode comprises a plurality of pixel electrodes, and respectively this pixel electrode is arranged in respectively this pixel, and is electrically connected with corresponding respectively this thin film transistor (TFT).
CNB2005100039642A 2005-01-05 2005-01-05 Visual angle adjustable liquid crystal display Active CN100353229C (en)

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